SI5341_IN_SEL_MASK
return (val & SI5341_IN_SEL_MASK) >> SI5341_IN_SEL_SHIFT;
val = (index << SI5341_IN_SEL_SHIFT) & SI5341_IN_SEL_MASK;
SI5341_IN_SEL, SI5341_IN_SEL_REGCTRL | SI5341_IN_SEL_MASK, val);